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Analog Electronics

Analog Electronics
What is the input impedance of a common-gate configured JFET?

  Very high.
  Very low.
  High.
  Low.

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Analog Electronics
Three identical amplifiers with each one having a voltage gain of 50,input resistance of 1KΩ & output resistance of 250, are cascaded. The open circuit voltage gain of combined amplifier is

102dB
49dB
98dB
51dB

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Analog Electronics
The number of valence electrons in silicon atom are :

 1
 4
 3
 2

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Analog Electronics
Most of the electrons in the base of an NPN transistor flow

 out of the base lead.
 into the emitter.
  into the collector.
 into the base supply.

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Analog Electronics
When the JFET is no longer able to control the current, this point is called the

  pinch-off region.
  breakdown region.
  depletion region.
  saturated point.

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Analog Electronics
The output voltage of an emitter follower is across the

 DC collector resistor.
 emitter diode and external AC emitter resistance.
  load resistor.
 emitter diode.

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MORE MCQ ON Analog Electronics

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